Error(s) in re-building vignettes:
--- re-building ‘gurobi_installation.Rmd’ using rmarkdown_notangle
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'gurobi_installation.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘gurobi_installation.Rmd’

--- re-building ‘prioritizr.Rmd’ using rmarkdown_notangle
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'prioritizr.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘prioritizr.Rmd’

--- re-building ‘publication_record.Rmd’ using rmarkdown_notangle
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'publication_record.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘publication_record.Rmd’

--- re-building ‘saltspring.Rmd’ using rmarkdown_notangle
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'saltspring.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘saltspring.Rmd’

--- re-building ‘tasmania.Rmd’ using rmarkdown_notangle
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'tasmania.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘tasmania.Rmd’

--- re-building ‘zones.Rmd’ using rmarkdown_notangle
dyld: lazy symbol binding failed: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ____chkstk_darwin
  Referenced from: /usr/local/bin/pandoc (which was built for Mac OS X 10.15)
  Expected in: /usr/lib/libSystem.B.dylib

Error: processing vignette 'zones.Rmd' failed with diagnostics:
pandoc document conversion failed with error 6
--- failed re-building ‘zones.Rmd’

SUMMARY: processing the following files failed:
  ‘gurobi_installation.Rmd’ ‘prioritizr.Rmd’ ‘publication_record.Rmd’
  ‘saltspring.Rmd’ ‘tasmania.Rmd’ ‘zones.Rmd’

Error: Vignette re-building failed.
Execution halted